A pump assembly is provided for use with an inflatable product. The inflatable product has a chamber having an air inlet and an air outlet. The pump assembly has a pump unit that is positioned inside the chamber for inflating and deflating the chamber, the pump unit having at least one motor that is operatively coupled to a first blower and a second blower, with the first blower fluidly coupled to the air inlet and the second blower fluidly coupled to the air outlet. The chamber is inflated by intake of air through the air inlet to the first blower and then into the chamber, and the chamber is deflated by drawing air from the chamber to the second blower and then out of the chamber through the air outlet.

Described is a cooler having: a heat exchanger for dissipating heat from a medium, for example oil, a fan having a fan housing, a fan wheel and a motor, a control unit for controlling the motor, a sensor unit for detecting an operating parameter of the heat exchanger and/or of the fan, the sensor unit being connected to the control unit in order to set an operating state of the cooler, the fan housing having a recess in which the control unit is arranged together with the sensor unit.

A blower may include an inlet, an outlet, an airflow pipe disposed between the inlet and the outlet, a fan disposed in the airflow pipe, an electric motor disposed in the airflow pipe and configured to drive the fan, a motor housing that is disposed in the airflow pipe and houses the electric motor, and a control unit configured to control the electric motor. The control unit includes a control board configured to control the electric motor and a casing that houses the control board. The airflow pipe may include an exposure hole connecting inside of the airflow pipe to outside of the airflow pipe such that the inside and the outside are in communication in a radial direction. The casing may be attached to the airflow pipe such that at least part of the casing covers an entirety of the exposure hole from outside in the radial direction.

A method of operating a variable speed pumping system. The method includes measuring a first power consumption value of a pool pump at a first speed, estimating a first total dynamic head value at the first speed, measuring a second power consumption value of the pool pump at a second speed, estimating a second total dynamic head value at the second speed, and generating a system friction curve based on the first total dynamic head value and the second total dynamic head value. The method also includes categorizing the variable speed pumping system into a pumping system category based on the system friction curve and recommending a modification to the variable speed pumping system based on the pumping category.

A variable speed pumping system coupled to a fluid circuit of an aquatic application is provided. The system includes a motor, a variable speed drive in electrical communication with the motor, and a housing designed to substantially enclose the motor and the variable speed drive. The housing includes a drive cover extending over the variable speed drive and an end cover. A controller is configured to provide control of the variable speed drive. An electrical communication assembly is in communication with the controller and contained underneath the end cover. The electrical communication assembly includes an RS-485 terminal block, and a selectively removable IO expansion module sized and shaped to be received into a receptable of the drive cover. The IO expansion module has a module cover and a module circuit board, and the module circuit board includes a plurality of relay terminal blocks and a plurality of digital input terminals.

A cross-flow fan includes a cylindrical impeller having an annularly designed first magnetically effective core disposed at a first end, an annularly designed second magnetically effective core disposed at a second end, a plurality of vanes arranged between the first magnetically effective core and the second magnetically effective core, a first stator, which is a bearing and drive stator, and which interacts with the first magnetically effective core as a first electromagnetic rotary drive, and a second stator, which is at least a bearing stator, and with which the second magnetically effective core is capable of being magnetically levitated without contact with respect to the second stator. The impeller is magnetically driven without contact by the first and the second stators and magnetically levitated without contact with respect to the first stator and the second stator.

A blower configured to be positioned in confined spaces and to provide ventilation of a fluid, such as temperature controlled air, is disclosed. In various embodiments, the blower is configured to have a reduced axial thickness, which can be desired in such confined spaces. In some embodiments, the blower has an integral filter, a wire channel for the routing of one or more wires, and/or an exposed backplate. In some embodiments, the blower has a snap-fit circuit board, containment system for mounting the motor, one or more vanes for directing fluid flow, shrouded impeller, and/or integrated connector.

Provided is a vacuum pump apparatus which allows reductions in thickness, weight, size, and cost of a vacuum pump control device. In the vacuum pump apparatus, a pump main body unit and a control unit which controls driving of the pump main body unit are integrated with each other. The vacuum pump apparatus has a configuration in which a spacer configured to support a load applied to a housing of the control unit is provided between a base of the pump main body unit and the housing of the control unit.

To provide a vacuum pump capable of efficiently cooling electrical equipment. The vacuum pump includes a pump main body and an electrical equipment case disposed outside the pump main body, wherein the electrical equipment case includes a cooling jacket which has an inner surface and an outer surface in a vertical portion and in which a cooling medium flow passage is formed, and a plurality of electrical equipment that have circuit components and can be cooled by the cooling jacket. The inner surface and the outer surface are formed facing different directions, and the electrical equipment portions are attached respectively to the inner surface and the outer surface so that heat can be transferred.

A smart air pump comprises a housing defining an accommodating chamber. A main air pump is located in the accommodating chamber for inflating or discharging air from an inflatable body. The main air pump includes a cover defining an inlet and an outlet port. The cover divides the accommodating chamber into an impeller and a driving chamber. An air replenishing pump is located in the accommodating chamber. A driving switch, located in the driving chamber, connects to the main air pump. A central control unit electrically connects to the main air pump, the air replenishing pump, and the driving switch. The central control unit comprises a time control module configured to initiate periodic replenishment of air to the inflatable body. The time control module has a setting module and a counting module. An inflatable device including a smart air pump is also disclosed herein.